Gas burner



ug- 9, 1932- LE ROY o. BROWN 1,870,668

GAS BURNER I Filed Feb. 1a, 1951 K 4. y y

fas

Patented Aug. 9, 1932 UNITED STATES PATENT OFFICE LE ROY O. BROW'N, OF CHICAGO, ILLINOIS, ASSIGNOR TO JUSTRITE MANUFACTURING COMIPANY, OF CHICAGO, ILLINOIS, .A CORPORATION OF ILLINOIS GAS BURNER Application filed February 18, 1931.

This invention relates to burner tip feed nozzles or ducts for gas consuming illuminating devices, such as acetylene lamps and particularly for the burner tips of miners lamps and lanterns.

In the last-mentioned type of illuminating devices, the gas-feed pipe, leading from the gas generating chamber to the burner tip, eX- tends through the water reservoir and through a Wall thereof to the burner tip which is closely proximate to said wall. The burner tip, per se, usually made of lava, is held in place by metallic fittings directly associated with the discharge end of the gas feed tube. These ttings and said tube become very hot and this heat is, in turn, absorbed by the water in the reservoir which frequently becomes so hot that the reservoir cannot be touched without causing burns. This absorption of heat by the said fittings and tubing and the resultant heating of the water in the reservoir offsets the advantage of causing the gas to pass through tubino` partially surrounded by water to be cooled in passage. In fact when the water becomes hot. the temperature of the fittings and burner tips is increased so that the gas is heated to a high degree before its discharge and this tends to cause carbonization of gas at the burner tip orifice, which becomes obstructed and occasions a red. smoky flame.

l This condition rpertains more particularlv to lampsand the like wherein the fla-me is directed downwardlyinstead of upwardlv or horizontally: but preventionof undue heat absorption bythe water in the reservoir in the last-mentioned types of acetylene gas lamps is also verv advantageous.

Hence, the object'of'the present invention is to provide a burner structure for lamps, and particularly for acetylene gas lamps, which will reduce greatly the heating of the gas duct in order that the gas may reach the burner orifice without having been appreciably preheated. i

A further object of the invention is to provide a structure of the type above set forth which is simple, cheap, and efficient.

In the accompanying drawing illustrating Serial No. 516,691.

the most suitable embodiment of the invention:

Fig. .l is a fragmentary vertical sectional view showing the water reservoir of a miners acetylene lamp equipped with a burner structure embodying the invention, said structure being shown in vertical section.

Fig. 2 is a vertical transverse sectional view on the line 2 2 of Fig. l.

Figs. 3, 4, and 5 are perspective views of various component parts of the structure.

In the instance illustrated', the gas pipe l leading from the generating chamber below the water reservoir 2, extends to the upper part of the latter and there connects with a member 3 fitted into an opening in the top wall of the reservoir and is soldered or otherwise secured in place. f

The member 3 is provided with a bore 4 closed at one end and opening into a chamber 5 having a tapered inner wall, said chamber constituting the mouth portion of the member 3 which is externally threaded at this end to receive the cap-nut 6.

The head of said nut 6 is provided with a central opening and the circumferential wall of said nut is provided with perforations 7 A substantially cylindrical member 8, provided between its ends with an annular flange 9, which is engaged by the head of the capnut 6, projects at one end into the mouth portion of the member 3. This end portion of said member 8 is externally tapered and engages in the internally and externally tapered ferrule l() composed of a` suitable material not adapted to conduct heat, but which is heat resistant and flexible. The material known as bakelite is adapted to the purpose.

The cap-nut 6 serves to force the said tapered end portion of the member 8 into the ferrule 10 and force the latter into the tapered mouth of the member 3 to form a fluid-tight connection between the members 3 and 8. n

The outer projecting end portion of the member 8 terminates in a threaded projection ll. Adjacent said projection, member 8 is externally tapered and said tapered portion is provided with an annular groove 12. A radial opening 13 `connects the groove 12 with the bore 14 of said member8, thus establishing communication between the opening 13 and the pipe 1.

A washer 15 of asbestos yor composition of a nature similar to that of which the ferrule 10 is composed, is interposed between the flange 9 of the member 8 and the head of the nut 6. The inner diameter of the flange 9 and the central opening in the head of the nut 6 is of greater diameter than the body of the member 8 so that there is nocontact between the latter and the nut 6 whereby the temperature ofthe member 8 is transmitted to said nut. Thus a free annular space is provided around the flange 9 through which and the perforations7 of the nut 6, air circulates to absorb heat from said nut and said flange.

In the instance illustrated, the burner tip 16 and the burner tube 17 project` downward- 1y. The burner tube 17 is provided in its upper end with a tapered transverse opening to receive and snugly fit the tapered portion of the projecting end portion of the member 8 and is held firmly in place on the latter by means of the nut 18. The gas feed passage 19 of said tube 17 communicates withthe annular groove 12 of the member 8.. j

The said tube 17 is fitted with the tip 16 and the cap element 20, which is old in the art.

The essentially novel features of construction presented comprise the washer 15, the ferrule 10, the perforations 7 of the cap-nut 6, and the disposition of the latter out of contact with any part of the member 8, thereby to insulate the nut 6 from said member 8 and insulate the latter from the member 3.

The burner tube 17 absorbs heat from the cap element 2O regardless of whether the flame is projected from the tip 16 upwardly, horizontally or downwardly, and this heat is transmitted to a very appreciable degree to member 8. In the absence of the aforesaid insulation of the latter from the nut 6 and member 3, the heat is transmitted to the member 3, the yadjacent wall of the reservoir 2 and to the water therein, which also absorbs heat from the gas passing through the pipe 1. In the instant structure, the member 8 will be heated to a greater degree than in instances of other directions of projection of the flame, so Vthat the prevention of heat transmission becomes imperative. In instances in which the member 3 or its equivalent is disposed at an appreciably lower point relatively to the top wall of the tank and thus below the normal watery level in the latter, as is common in this art with lamps having horizontally and upwardly projecting flames, respectively,lthis insulation is also imperative. In practice, it is found that the present invention keeps the maximum temperature of the water in the reservoir about 35 degrees to 40 degrees below the maximum temperature attained by the water where the insulation is omitted.

The insulation is effected without sacrifice of any mechanical advantage such as easily effecting adjustments and replacements of parts.

I claim as my invention:

1. A gas burner including a gas feed member having an externally7 threaded end portion, a, cap nut engaged therewith, a gas conductor projecting at one end into said feed member and having its other end portion projecting through a central opening in the head of said nut, an annular flange on said conductor disposed between the head of said nut and the mouth of said feed member, an insulating'member interposed between said feed member and said conductor and maintaining all parts of therlatter out of oontact with said feed member, and an insulati element interposed between said flange o said conductor and the head of said nut.

2. A gas burner including a gas feed member having a flaring discharge orice, a tubular gas conductor equipped between its ends with an annular flange and having a tapered end portion of smaller diameter than said orifice and projecting into the latter, a tapered insulating ferrule interposed between said tapered end of said conductor and the opposed wa-ll of said orifice, a cap nut having threaded engagement with said feed member and having a central opening in its head,y and an insulating washer interposed between the head of said nut and the said ange.

' 3. A gas burner including a gas feed member having a flaring dischar e orifice, a tubular gas conductor equipped etween its ends with an annular flange and having a tapered end portion of smaller diameter than said i orifice andprojecting intoV the latter, va tapered insulating ferrule interposed between said tapered end .of said conductor and the opposed wall of said orice, a ca nut having threaded engage-ment with sai feed member and having a central opening in its head, and an insulating washer interposed between the head of said nut and the. said flange, there bein a free annular spacey between the circu erential wall of said nut and the said flange, and the central opening in the head of said cap being ofk greater diameter than the portion of the conductor projecting therethrou h.k t

4. gas burner including a gas feed member having a flaring discharge orifice, a tubular gas conductor equipped between its ends with an annular flange and having a tapered end portion of smaller diameter than said orifice and projecting into the latter, a tapered insulating ferrule interposed between said tapered end of said conductor rand the Y oppOsed wall of said orifice, a cap nut having threaded engagement with said feed member and having a central opening in its head,

and an insulating washer interposed between the head of said nut and the said flange, there being a free annular space between the circumi'erential wall of said nut and the said flange, and the central opening in the head of said cap being of greater diameter than the portion of the conductor projecting therethrough, said nut being provided with perforations communicating with said annular Space.

5. A gas burner including a gas feed member having an externally threaded end p0rtion, a cap nut engaged therewith, a gas conductor projecting at one end into said feed member and having its other end portion projecting through a central opening in the head of said nut, an annular flange on said conductor disposed between the head of said nut and the mouth of said feed member, an

insulating member interposed between said feed member and said conductor and maintaining all parts of the latter out of contact with said feed member, and an insulating element interposed between said flange of said conductor and the head of said nut, there being free space between said conductor and the surrounding portions of the nut accessible to air circulation.

In testimony whereof, I have hereunto set 3o my hand this 16th day of Februar 1931.

LE ROY O. BR WN. 

